bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/request/ApplyTemplatesRequest.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.layer0.request;
  13
  14 import java.util.ArrayList;
  15 import java.util.Collection;
  16 import java.util.HashMap;
  17 import java.util.HashSet;
  18 import java.util.Map;
  19
  20 import org.simantics.db.Resource;
  21 import org.simantics.db.WriteGraph;
  22 import org.simantics.db.exception.DatabaseException;
  23 import org.simantics.db.layer0.adapter.Template;
  24 import org.simantics.operation.Layer0X;
  25
  26 /**
  27  * Applies templates to an instance.
  28  * @author Hannu Niemist�
  29  */
  30 public class ApplyTemplatesRequest {
  31         Map<String, Object> parameters;
  32         Collection<Resource> contexts;
  33
  34         public ApplyTemplatesRequest(Map<String, Object> parameters,
  35                         Collection<Resource> contexts) {
  36                 this.parameters = parameters;
  37                 this.contexts = contexts;
  38         }
  39
  40         public ApplyTemplatesRequest(Map<String, Object> parameters) {
  41                 this(parameters, new ArrayList<Resource>(2));
  42         }
  43
  44         public ApplyTemplatesRequest() {
  45                 this(new HashMap<String, Object>());
  46         }
  47
  48         public void perform(WriteGraph g, Resource resource) throws DatabaseException {
  49             Layer0X L0X = Layer0X.getInstance(g);
  50
  51                 parameters.put("", resource);
  52
  53                 // Use default context if no other contexts have been defined
  54                 if(contexts.isEmpty())
  55                         contexts.add(L0X.HasTemplate);
  56
  57                 // Collect templates
  58                 HashSet<Resource> templates = new HashSet<Resource>();
  59                 for(Resource context : contexts)
  60                         templates.addAll(g.getObjects(resource, context));
  61
  62                 // Apply templates
  63                 for(Resource template : templates)
  64                         g.adapt(template, Template.class).apply(g, parameters);
  65         }
  66
  67         public void addContext(Resource context) {
  68                 contexts.add(context);
  69         }
  70
  71         public void addParameter(String key, Object value) {
  72                 parameters.put(key, value);
  73         }
  74
  75         public <T> T getParameter(String key) {
  76                 return (T)parameters.get(key);
  77         }
  78
  79         public Map<String,Object> getParameters() {
  80                 return parameters;
  81         }
  82 }